/Engine/Plugins/Online/OnlineServices/Source/OnlineServicesInterface/Public/Online/Sessions.h
struct FUISessionJoinRequested
EUISessionJoinR...
JoinRequestedSource
Join request source
FAccountId
LocalAccountId
Id handle for the local user associated with the join request
TResult<FOnlin...
Result
Id handle for the session the local user requested to join, or the online error if there was a failure retrieving it